22251516 has 24 divisors (see below), whose sum is σ = 59337600. Its totient is φ = 6357552.

The previous prime is 22251503. The next prime is 22251533. The reversal of 22251516 is 61515222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132366 + ... + 132533.

It is an arithmetic number, because the mean of its divisors is an integer number (2472400).

Almost surely, 2^22251516 is an apocalyptic number.

It is an amenable number.

22251516 is an abundant number, since it is smaller than the sum of its proper divisors (37086084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22251516 is a wasteful number, since it uses less digits than its factorization.

22251516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264913 (or 264911 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 22251516 is about 4717.1512589698. The cubic root of 22251516 is about 281.2677041695.

Adding to 22251516 its reverse (61515222), we get a palindrome (83766738).

It can be divided in two parts, 2225 and 1516, that added together give a triangular number (3741 = T₈₆).

The spelling of 22251516 in words is "twenty-two million, two hundred fifty-one thousand, five hundred sixteen".